IMVU (short for Instant Messaging Virtual Universe) is an extraordinary virtual social application based on 3D characters and scenes with years of development. Compared with traditional text or voice IM chat, it creatively adds 3D characters. This can not only increase the atmosphere of chatting with simulate the real scenes, but also simulate the actions of characters, thus greatly enhancing the interactivity and fun of chatting. Players can meet other people unexpectedly while exploring a large number of exotic 3D virtual scenes, realizing global friendship.

Privacy is one of the most basic human rights. When we talk to our loved ones at home, usually no one will hear us. But when we cross geographical barriers and chat through chat software, there may be someone who has been listening. When things go from offline to online, this kind of change that makes everyone uncomfortable should not happen. We should be thankful that many people are fighting for this right for themselves, and that Signal can be an important tool to maintain our privacy online.

There are already countless chatting software (such as WhatsApp, Skype, Discord, Facebook Messenger), but almost all of them are non-free software based on central servers, and their security and privacy are not guaranteed (any chat history of you will be sold to various companies). Many of them claim to encrypt communication content, even with end-to-end encryption, but when a platform is proprietary, there is simply no way for others to verify that it is as secure and private as it promises to be. Of course, there are some really safe and reliable ones, but they are frequently blocked by governments of various countries and cannot continue (such as Signal, Telegram).

Although most people today have never had access to a radio, it can be very useful in some situations. For example, when you are in an area without Internet or cell phone signal coverage, you can use a radio device to stay in touch with the outside world. For better and easier access to radio equipment, you'll need third-party amateur radio tools like Ham Radio Deluxe (which are all much better than the official ones).

TeamTalk is a free and open-source multi-user conferencing system for Windows, Mac, Linux and mobile platforms, developed by Bjoern D. Rasmussen from Denmark. It allows user to perform real-time voice and video communication through Internet. For voice encoding, it uses the Opus and Speex audio codecs; for video streaming, it uses the WebM video codec.